Combined coal stoker and burner



Dec. 4, 1928. 1694929@ J. C. ST. CLIM COMBINED COAL sToKER AND BURNER Filed April 11. 1.927 2 sheets-Sheet 1 @ma 4, w28,

J, c. sT. CLAHR COMBINED COAL STOKER AND BURNER Filed April ll, 1927 2 Sheets-Sheet 2 INVENTQR 5f Clau BY mqf,

ATTORNEYS Patented Dec. 4, 192s.

I air is forced downwardl the fire box, the fuel being fed to the 'box UNITED STAT-Es y 'PFA TENT" olfriclaz.-

com lcniaisriiin sr. CLAIR, or Burma, MONTANA.

CGMBINED COAL STOKEE-AN'D BURNER.

Application led April 11,1927. Serial No. 182,890.

This invention relates to a combined coal stoker and burner, the primary object of the invention forming the subject matter of thisv application being to provide means whereby upon th'eJ fuel in or the burning area thereof through the medium of an automatically reciprocated stoker.

This application is directed to an improvement on the apparatus constituting the subject matter of my original application filed July 22, 1925, patent'issued June 21', 1927,

and given Patent Number 1,633,465.

With this and other objects in view, the

A invention consists in certain novel featuresl' 3 in a furnace of construction and combinations 'and arrangements ofparts which will be more fully hereinafter described and pointed out thel claim.

In the accompanying drawings- 1 Figure 1 is a plan view of my improved' apparatus showing one form of air-direct ing means such as illustrated in the appara-- tus of my original application;

Figure 2 is a view in vertical section and at right angles to Figure 1;

Figure 3 is a perspective view of the Stoker box and air-directing flue; p

Figure 4 vis a view, similar to Figure 3 but partly in section, illustrating al modification; Figure 5 is a plan view, partly in section, of the structure shown in Figure 4.

1 represents a table or support which may be 'adjustable vertically and is preferably portable/ and which supports a fire box "2 adapted to be projected through an opening The fire box 2l has a hopper 5 at it's'outer end through which fine fuel 6 may be di` rected into the path of a reciprocating stoker 7 to feed the saine longitudinally of the fire box 2.

The Stoker 7 is connected 'by a link 8 with an outlet crank disk 9 on avshaft 10 supported onthe table 1, and 11 is a blower also mounted on the table'l and having a discharge flue l2 with an outlet nozzle 13 located y ,above the fire box and provided with orifices 14through which ythe air is' directed downwardly onto the fuel in the re box.

This Hue 12 and nozzle 13 are illustrated in Figures 1, 2 and Band are of angular form in cross section which is theform illustrated in my original application above referred to.

ling and having a nozzle However, in constructingthis flue and nozzle,

I preferably employ a, form of device' such as illustrated "in Figures 4 and 5. In this form of the devicelthe air fine 14, corresponding to flue 12, may be in circular form and has a swivel gooseneck nozzle 15 at its end whichmay be positioned over the fire box to discharge the air downwardly therein, or may be swung 'to oneside, as' occasion may require.

'The flue 14 has an opening 16 therein communicating with an opening 17 in the side wall of the -fire box 2 so as to allow a certain amount of air. to enter the fire box and keep the fuel back of the point of combustion relatively cool. v

The air blower 11 and the shaft 10 may both be driven by a single motor 18 through the medium of gearing 19 with `a gear box 20 on table 1, and the electric circuit to the motor 18\,may be controlled by a thermostat Various changes and-alterations might be V made in the general form of theparts described without ldeparting -fromthe invention a/nd hence Ido not limit myself, to the precise details set forth but consider myself at liberty to make such changes and alterations as faiyly fall within ,the spirit and sc'ope of the appended claim.

I claim: n a device of the 'character described, a hollow body extending into anopcning in a side wall of the furnace casing, said hollow bodyconstituting a fire box portion ywithin the furnace casing, a fuel outside. of the furnace open fuel feeding passage extending through. the opening in the wall of said furnace casing and extending between said fire box and said lower l in sai fuel feeding fuel` from said fuel supply chamber toI said supply chamber at its upper end g l at the outer side of the furnace casing and a[ fire box and an air delivery conduit extending alongside of said body into saidfurnace casportion supported' above'said fire box, said discharge nozzle having rowsfof spaced discharge apertures in its'lower part located in position to discharge air blasts downwardlyand outwardly onto fuel within said fire box;

JOHN CHRISTIAN ST. CLAIR.

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